<template>
  <div>
    <div id="app">
      <div>
        <div style="display: inline-block" v-for="(item,index) in arr" :key="index">
          <input type="checkbox" :value="item" v-model="newArr"/>
          <span>{{item}}</span>
        </div>
        <p>你选中的元素, 累加的值和为: {{total}}</p>
      </div>
    </div>
  </div>
</template>

<script>
export default {
  data() {
    return {
        arr: [9, 15, 19, 25, 29, 31, 48, 57, 62, 79, 87],
        newArr:[],
    }
  },
  computed: {
    total(){
     return this.newArr.reduce((prev,item)=>prev+item,0)
    }
  },

}
</script>

<style></style>
